Building-block.



D. G. HAEGER. BUILDING BLOCK. APPLICATION FILED APR. 9, 1913.

Patented Apr. 14, 1914.

awumio'r,

'- t e c simmer stem;

m N -Bmis I citizen of; United States,' residing; at -Elgin', intheQcounty. of Kane and-State of Illinois, have .invented-gcertain newand .usefullmproveinents'inI-Bnilding Blocks, of

*whichthe following isi'a specificationr ;This' 'mven tion relates tobuilding blocks, and more particularl'y'to that class of build- 'ingblocks adaptedto form a circular wall,

silo-construction 'and similar iip wall.

'With thi nd other ohjects inview invention consists in the peculiarconstruc- Ltion of a-building block as will be herein;

after described and more. particularly yed out in the appended claim;

a Referring to the drawings wherein similar reference numeralsuindicatesimilar parts Wherever used, Fi' re 1 is a horizontal sec-- tion throughavva liconiposedofqtheblocksg Fig a perspective view ofthe block;

. itself; Fi 3 is aplanfview of the block;

' Each the blocks-comprises a front face 4 preferably-smooth but whichmay receive any suitable ornamentation. The two side walls 5-2-5 and therear face 6 are provided.

A -ivith dovetailed ribs 7," adapted to retain the the same.

inortarwhenthe block isv inposition in thewan. 'The block is providedwith intersect-j ing-wvebs 8 ,which define intermediate chant;- bars -9preferably; open (throughout the en--' length of the .hlock, sons topermit'the;

free passageofairthrough theibloclc. Ad-'- 'jacent the front and rear,faces of the block the side walls 5 are-.curved'in. substantially theform of an" S, the side wall first outwardly and then inwardly, theoppositelv disposed side \vallcurved parallel e In the preferreconstruction shovvn' the sidewalls-5 are constructed 'torformabulged-out portion '10 ad'acent each face of parallel to the oppositelb l the block. Adjacent the ulged-out portion upon each side Wallisanjinwardly curved "portion 11, the; icnrve of said inwardly -with'andcurved ortion' correspond p ulg' gid-out portion I passages 9 -tvilLbeformed with pecnliar outlines, thesaid passages being straight upontheir inner edges at the intersection'of the webs 8 and curved at theirouter edges formed" by thefend-walls- 5. This construe- -tion.all 0w'sof lar er air'spaces within the blocks. Uponeach of the side walls 5 andthereof is, formed a. groove 12. This oove is adapted to receive a tierod hereinafter described. The outer surface of the block than'the inneror groove-surface, which construction gives "t particularly adapted tobe placed.-

Whenit is desired to form a circular wall eachblock to be disposed at anangle. The

each angle a certain part of thecircumference of. a circle. .Thus the,blocks will adapt themselves'to the circularwalls After one layerfoftheblocks is in'positio'n a' me'tal tie rod is placed in-the recess:12'.and tightly fastened therein by means of a turn buckle placed -inpeated.--

- I am aware that considerable variation is position andf the operationrefro n the spirit ofnix-invention, and; I- do herent in the: structureshown; described Havingfthus described iiiyinvention {What .te'rsPatentis:

. curved vertically disposed;

upon'th'e' Widercentral web at the .center' \i'hen'in the position shownin'Fig. l isfwid'er- I e block a slight wedgeshape in order thatit':will;better-conform to the curvature'ofthe wall in which it is theblocks are placed so .that the bulged, out vportions lOQof one block fitinto the' inwardly curved portionsljof another block, as shofvn in Fig.1; Thet'ape'rof-the block', from face to facecauses thQfront'faces' of16 of the usual'type. The next layer is then P i le; in the detailsofconstruct-ion hereinshmvn d b w thout departing;

not intend. to limitn yselfthereto, except as pointed out in thegfolloyving claim in which it'is my ntention .toclaim all the-noveltyfin-f,

,A, relatively fiat hollow :tbuildin'g ..having;'substantially squareinner and onter faces adapted to stand ou -edge in circular-41 5; wallconstruction fand having'tf-{reversely. X

taper'of the'block is so'regulated as to make as broadlyas-the stateofrthe permit.-

-'outer surface offthe hlock"b'eing widerthafi 1 of the ogposite side weDue to the vcurvthe inner surface, intersecting interior walls i lbf t esidewalls of the blocks the air connecting the inside and outside wallsand also the two side Walls, curved grooves i n In testimony whereofI'affix-mysignature the topand bottom surfzces of one inte' in presenceof two witnesses.

sectin wall in w lich rein orcin or tie re s..- w

are adapted to be embedded and t he' connect: 7 DAVID HAEGLR' .5 ing andinnerfaces of said block being pro- Witnesses:

vided with grooves to retain mortar when Lflil'f JANE I'IEALD,

positioned in the wall. Jess-G. SPILLARD.

